Vial



FIG. 1 is a perspective view of the vial according to my design;

FIG. 2 is a front elevation view thereof showing the unclaimed lid removed;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The broken lines in the drawings depict portions of the vial that form no part of the claimed design. 

CLAIM The ornamental design for a vial, as shown and described. 